There are two theories of color vision. the theory correctly describes color vision in the retina, while the theory correctly explains color vision in the ganglion cells and visual cortex. frequency; place place; frequency opponent-process; trichromatic trichromatic; opponent-process

The trichromatic theory and the opponent-process theory

Explanation:

Trichromatic theory- It states that there are three types of receptor cells in the retina, which reacts to the light of three different wavelength that are green, blue and red. These receptor cells are responsible for perception of colors.

Opponent-process theory- It states that the colors that we perceive is controlled by opposing systems. Blue, green, yellow and red are the four colors that we need to characterize perception of color. There are three opposing channels in our vision : blue/yellow, black/white and red/green.